Executoe of kins e



dem 7 K. R, COLLINS, Decd.

E D RICHMOND; executor ARTIFICIAL LEG.

Pat en-tedQMar. 25

WITNESSES- Z Q ZMWQ My ATTORNEYS N Firms. Phmmulhngnphzm \Muhingluu. DJ;

EDGAR D. RICHMOND, OF HART, MICHIGAN,

PATENT @rricn.

EXECUTOR OF KINS R.

COLLINS, DECEASED.

ARTIFICIAL LEG.

Application filed November 9, 1883.

To all zohonaitmaly concern: I Be it known thatKIlvs R. OoLLINs, ofHart, in the county of Oceana and State of Michiputations, designed tocient, and durable leg, as hereinafter fully described.

Reference is to be had to the accompanying responding parts in all thefigures.

Figure l is a side elevation of my improved artificial leg. Fig. 2 is asectional elevation, and Fig. 3 is a detail of the ankle-joint device.

The thigh-socketa and the lower leg-section, b, are made of strongleather 0, and covered with rawhide d, the latter being painted withwater-proof paint, which makes a lighter,

The foot, consisting of the. main section 0 and toe-seotionf, is of woodor any approved material, with a leather sole,

when walking, and to restore it to the normal position when the foot islifted from the ground. A strong flat rubber spring, j, fitted on theinside of the sole may serve this purpose; but coiled springs may beused instead or in combination with it.

For connecting the foot to the leg at the an kle-joint, a Wood block,70, is fitted in the lower end of the lower section, b, of the leg, inwhich the knuckle Z of the anklejoint is secured by two bolts, m, ofsaid knuckle, which extend up through the block and have nuts IzscrewedThe pintle 0 of said joint is secured possible insuch legs.

to the foot 6 by the rod p thereof extending down through the foot andmade fast by nuts 9 in the socket 8. Each side of the ankle joint-thatis, before and behin'dis fitted a spring, 9, to balance the foot on thejointand hold the foot ground.

For the knee-joint a metal bar, If, isattached to each side of thesection 12, within the same, and extending upward and through the sideslevel when raised ofi the spective sections of the leg for permanentattachment thereto. It will be seen that these joints are verysubstantial and will not have lateral play,'which is to be avoided asmuch as The pivot to of this joint extends through from one to theother, and a pulley, as, is arranged on it between the two joints, andthe suspensory strap y is connected to the leg by passing it throughslots of the socket a at z and under the pulley, thus making a simpleand substantialconnection, capable of ley as the body of the wearermoves, and preventing any uncomfortable strains as the body acts, andalso the leg. 7

The extensor -spring 'a is connected to the I block 7:; in the ankle bya joint, b, back of the anklejoint pivot, and a doubled cord, 0', isstretched from the eye (2 of the upper end up through holes 6, throughthe lower end of the socket a, a little forward of the knee-joint piv-0t, and thence the cord is passed through two holes, f, at the back ofthe socket a,where the two parts of the cord are to be tied to maintainthe proper tension on the spring.

It is proposed to cushion the top of the thigh a with pads k fitted tothe top of the same, as shown, for upper amputations.

The thigh-socket is provided with vent-holes i, for the circulation ofair for ventilation.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is- 7 i in front of the Vertical lineof the knee-j oint,

1. The suspension-strap y, connected to the and also extendedthrough theside of thethigh- 10 I leg by passing through the sides of thethighsocket, to be tied for maintaining the tension of socket at z andunder the pulley 00, mounted said spring, substantially as described. onthe pivot-pin w of the knee-joint, substan- EDGAR D RICHMOND tially asdescribed. A I

The exbensopspring connected to the Emecutm of the estate ofKmsR.O0llms,deceased.

\Vitnesses:

ankle behind the ankle-j 0int,and having aeon- E. B. GAYLORD, J OHN R.BUTLER.

nection, 0, extended through the thigh-socket

